It's good to know. They do seem pretty preoccupied to answer questions these days. I assume they are overloaded with work or under staffed. When I went with DP I searched all over for threads or other information about any Honey Badger failures and could not find any information at that time. Unfortunately with any aftermarket diesel performance vendor you will have customers that are extremely happy and some that fall thru the cracks or had horrible experiences.
As far as making copies of hpops... The T500, Adrenaline, MB performance, and Jr pumps from what I dug up were all 20° swash plate pumps. As in they are using more stroke of the pistons to increase displacement. I have a funny feeling that they are all using the same supplier for those 20° plates as possibly those swash plates are from another hpop? The Srp1. 1 is the only stock housing pump with larger pistons which of course required a custom machined cylinder block.
DP does their own stuff, but they have had lots of failures. Just not many people post. I've bench tested just about all the competition. 
